Prescription sunglasses

Sunglasses are very popular because they protect the eyes from the bright sunlight. Diopter glasses that combine the function of sun protection and vision correction are in no less demand.

The sun affects the eyes in much the same way as it does the skin. There is only one small difference: the vessels of the eyes do not produce melanin, so they are completely defenseless and vulnerable to the rays of the sun.

Their impact can lead to the following consequences:

• Long-wavelength radiation causes macular degeneration and cataracts, which are the main contributors to blindness in the elderly.
• Medium-wave radiation provokes a burn of the cornea of ​​the eye, resulting in the development of lacrimation, blepharospasm, photophobia.
• Shortwave radiation is the culprit for the appearance of retinal neoplasms.

Sunglasses with prescriptions are required for those people with refractive errors who:

• They are engaged in active sports without the possibility of using contact lenses.
• They do not want to wear corrective lenses due to allergies and irritation.
• Have a high eye sensitivity to the sun; monitor the health of the organs of vision.

Unlike ordinary glasses that perform corrective functions, sun-protection models have the following advantages:

• A person with refractive disorders can clearly see objects without squinting or straining their eyes.
• The main problems of the eyes are solved - hyperopia and myopia.
• Sun glare is eliminated, which distracts attention and interferes with viewing the surrounding space.
• It can be used for practical purposes under certain conditions: playing sports, driving a car, etc.

Full eye protection is carried out when resting and working in open spaces during strong and prolonged exposure to the sun.

The first step is not to pay attention to the color, shape of the frame and lenses. Should:

• Get the advice of a competent ophthalmologist in order to choose glasses that can provide maximum protection from the sun's rays and correct vision.
• Make a purchase only in specialized optical stores, where products from well-known manufacturers are presented.
• Determine the most suitable lens material.
• Check in practice the indicator of the degree of protection against ultraviolet radiation.
• Put on an accessory and examine various items - there should be no color distortion.

When choosing glasses for drivers, the presence of an anti-reflective coating is taken into account - it is important when traveling by car. This coating is not available in all models. The absence of scuffs and cracks is an important factor.

One of the main functions of the glasses is to delay ultraviolet rays. Under dark glasses, the pupil usually dilates, therefore it becomes the most susceptible to negative influences. UV-380 - screening out 95% of ultraviolet radiation. UV-400 - filtration up to 100% of hazardous radiation. A mark about this indicator is usually located on the lens or indicated in the certificate.

An important parameter is the level of toning. It shows how much light the glasses let through and how much they trap ultraviolet rays. There are five degrees:

• "0" - transmit from 80 to 100% of the light. The lenses are colorless and suitable for cloudy, cloudy weather.
• "1" - light transmittance ranges from 43 to 80%. It is best to wear glasses in partly cloudy weather.
• "2" - the average level of darkness, the transmission of 18-43% of the light. Suitable for wearing in dim sun.
• "3" - very strong shading. Only 8 to 18% of the light passes through the lenses. They protect well from bright sunlight and are used on beaches. The most popular model among consumers.
• "4" - the maximum level of darkness. The transmission capacity is up to 8% of the light. They are worn in open sunny spaces.

Lens colors: black, brown, gray, gray-green. It is selected in such a way as to prevent distortion of the natural colors of the surrounding objects.

Glass or plastic is used as a material. Glass is strong, durable and durable. Due to its weight, it is not suitable for patients with severe visual impairments - this requires thick lenses that will be quite heavy. Damage quickly forms on the plastic, so you should store the product in a case or apply a special protective coating.

The framing does not affect the quality of the glasses in any way. But when choosing, you must take into account stylistic recommendations. Mainly guided by the shape of the face:

• Triangular - massive, large frames with an original top are suitable for it.
• Oval - frames of any shape look perfect with it.
• Round - the frame can be rectangular or square with beveled corners.
• Square - It is best to choose oval frames or glasses that do not have a frame at the bottom.

You should also take into account the color of the eyes, skin and hair, and the style of clothing. Thus, you can purchase a product that performs not only its direct functions, but also gives the image some zest.

The most common models are glasses with tinted overlays. They simply rise or are completely removed.Attached to conventional corrective lenses using clips. Their movements should be unimpeded, light. It is necessary that the main lenses and sun pads for glasses exactly match in shape and size, fit tightly to each other.

Polarizing models eliminate reflections that are trapped in a special protective plate. The advantages of glasses include good protection against UV rays, increased image clarity, no strain and no eye fatigue. These options are not cheap.

Glass or plastic is used as a material. Glass is strong, durable and durable. Due to its weight, it is not suitable for patients with severe visual impairments - this requires thick lenses that will be quite heavy. Damage quickly forms on the plastic, so you should store the product in a case or apply a special protective coating.

Photochromic coating (chameleon glasses) - change the degree of toning depending on the light intensity. During the production, a special technology is used, due to which, under the influence of ultraviolet radiation, the lenses darken and brighten when a person is in the room. This is the best solution for people with fear of light, increased tear production.

Lenses in such glasses will have to be changed quite often, because the properties of the photochromic coating are quickly lost. Some models are not darkened in the car - its glass practically does not transmit ultraviolet rays.

There are various options for glasses designed for:

• Children. It is best to start wearing prescription sunglasses at the age of 3-4. It is not recommended to purchase products with green and brown lenses - they transmit UV rays well. A rubberized hypoallergenic frame is required. Before buying a model, you need to try it on so that it does not slip and cause discomfort.
• Drivers. Glasses must eliminate glare, so polarizing options with a high degree of UV protection are most suitable. Thanks to the gradient coating (the upper part of the lenses is darker than the lower one) it is convenient to observe the road and dashboard. There are male and female models.
• Athletes. It is important that sports options hold firmly on the face, protect the eyes well from ultraviolet radiation, dust and wind, which causes tearing. You need rubberized arms, streamlined shape and light weight - best if the material of the product is plastic.

The main thing is that in the chosen model it is very convenient and comfortable to do what you love, as well as clearly see the surrounding space due to the diopter lenses.

Today, optics salons offer a huge range of glasses with lenses of various shades and in all kinds of frames. If there are severe visual impairments or their combination, for example, myopia with astigmatism, then it is worth ordering the product individually. It will come out more expensive than buying a ready-made model, but it will be more comfortable for the eyes.

You can use glasses with clips. Most opticians offer a corrective lens tinting service. This method is cheaper than custom options.

In any case, you need to contact only professional stores to get a high-quality and durable product.